MATERIALS AND METHODS

The second corneal specimen was a cor neal disk 7 mm in diameter removed during corneal transplantation of the right eye of a 20-month-old baby girl. During surgery, iris adhesions to the peripheral temporal portion of the opacification were removed with sharp dissection, leaving the iris grossly intact with the pupil responsive to mydriatics. The do nor cornea was sutured to the host cornea as reported with the left eye. The sutures were removed after four months and the graft has remained transparent to the pres ent time. Visual psychological testing per formed at the New York Lighthouse for the Blind indicated that the child could perform visual tasks equal to those of children in her age group with normal vision. The corneal specimens were fixed in 3% glutaraldehyde in 0.2 M sodium cacodylate buffer (pH 7.4) and post-fixed with 2% os mium tetroxide in 0.2 M sodium cacodylate and embedded in Epon. Thick sections of the epoxy-embedded tissue were stained with ba sic fuschin and alkalinized methylene blue and examined with the light microscope. Thin sections were cut with a LKB-3 micro-